I need to access SSH on machine A within another port than 22, because there are only the standard ports allowed to access from the network I use. Therefore, I want to route port 443 of machine B to ...

I want to run OpenVPN at home. I have a virtual instance of Debian 8 on my ESXi 6.0 host with its primary IP as 10.0.0.99. I assigned multiple virtual NICs (server, vpn, management, backup) with the ...

I am trying to allow access to a web server from the outside and I am getting nowhere. Granted I do not have any experience in iptables, but I have dabbled in Cisco ACL and NAT.
I am not sure what I ...

I am currently using psad to automatically block potentially harmful IPs. When it detects an attack it adds the ip to PSAD_BLOCKED_INPUT or PSAD_BLOCK_OUTPUT and then drops all further traffic from ...

I am trying to configure my iptables firewall (currently rejecting all traffic) to allow emails traffic. For SMTP port 465 is used (SMTPS port), and for IMAP it uses port 143. But whatever I try, I ...

On a linux server/router,
I want to block port 80 only for one IP (example : 1.2.3.4 )
I have been given this example :
### Block Incoming Port Requests (BLOCK PORT)
# To block port 80 only for an ip ...

I have created three namespace(ip netns), x, y z and a ip bridge called brig0.
I am trying to route packets to the pppoe connection in namespace y.
I want to know why tun0 says "no-carrier"?
How can ...

Is there a program on Debian to block an IP address temporarily just by launching a command (specifying the IP and the duration)?
With iptables/ip6tables alone I can create a rule, but I would then ...

I have a NAT set up, that allows my devices to bypass the MAC filter in the local dormitory router. The setup works, but since my original "nat server" has died (the HDD got fried), I had to put my ...

I am trying to setup an auto wake-on-lan setup using my router that is running OpenWRT 14.07, Barrier Breaker.
My idea is that the router monitors any connection attempts to the host I want to wake up ...

I have to test SNMP 2c Traps. I want to send those traps from some computer and the trap destination has iptables. So before the trap enters the NMS, I could just rewrite the real source of the trap ...

I mistakenly setup open resolver DNS server, which was soon used for bunch of DDoS attacks originating somewhere from / to russia. For that reason I completely blocked port 53 on both DNS servers for ...

I been using Ubuntu 12.04 for well 3 years and using it with kernel 3.2. I decided to upgrade to kernel 3.4 because some freezing problems starting to occur more and more. Well the update went well. ...

In my OpenWRT instance, I have added iptables rules in the Input filter table, but the problem is when I turn on my system I found that the rules are deleted. What can I do so that the rules are not ...

I'm very new to iptables and my goal is the block NEW and INVALID connections on the INCOMING chain and log any attempts for a NEW connection.
I'm also letting any and all traffic out on the OUTGOING ...